public class PositionNewEditOverrideExtension{
    // This simple extension is to demonstrate overriding the save function, and how to determine if the record
    //   should be updated or inserted during the save operation.  This extension could be used on both
    //   an Edit override and a New override simultaneously.
    
    // TODO: Declare a variable to hold the position.
    Position__c position;
    
    // TODO: Declare a Boolean variable to track if this is an insert or an update.
	Boolean b;
	
    // Declare standardController controller
    private ApexPages.StandardController controller;

    // Declare a string property to hold a message value
    public String myMessage { get; set; }

    
    // TODO: Write the extension constructor and initialize the member position variable by using a method on the standard controller.
    // TODO: Then update the Boolean to store if this is a create or update    
    public PositionNewEditOverrideExtension(ApexPages.StandardController c) {
		controller = c;
        this.position = (Position__c)controller.getRecord();
//        b = position.id == null ? false : true;
		if(position.id==null){
			b=true;
		}else{
			b=false;
		}

    }
    
    // This function is called from a commandButton on the page
    public PageReference SayHelloWorld(){
        // call this custom function from your visualforce page
        myMessage = 'Hello World!';

        // We're not redirecting the user to a different page so we just say return null
        return null;
    }
    
    public PageReference mysave(){
	//TODO: Override the save function.  Check to see if this is an insert or update and use the right DML command
    	if(b){
    		insert position;
    		controller = new ApexPages.StandardController(position);
    	}else{
    		update position;
    	}
        //TODO: Then navigate using the standard controller.
		return controller.view();
    }
   
}